Web Reference: To make locking at multiple granularity levels practical, InnoDB uses intention locks. Intention locks are table-level locks that indicate which type of lock (shared or exclusive) a transaction requires later for a row in a table. Jun 17, 2024 · In this article, I aim to introduce you to the common and fundamental locks in InnoDB. If you're not familiar, InnoDB is a storage engine for MySQL, and it’s the default one when you create a database. My goal here is to break down these locks in InnoDB using simple analogies and examples. This is my attempt to understand the locking mechanisms used by MySQL's InnoDB engine. I was trying to understand why lock wait timeout errors were occurring in an app I was working on. It turns out to be a lot more difficult to understand than you might expect, and it's not very well documented.
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